Major changes with SQL implementation

Author: nazmusweb-coding

NUB Admission Costing Calculator/Makefile

@@ -1,12 +1,15 @@
+# Makefile for compiling main program and cleaning binaries
 
 PROG = main
 OPTION1 = test
 
 CC = gcc
-CFLAGSANDLIBS = `pkg-config --cflags --libs gtk+-3.0` -lm
+
+CFLAGSANDLIBS = `pkg-config --cflags --libs gtk+-3.0` database/libsqlite3.a -lm
 
 ${PROG}: ${PROG}.c
 	${CC} ${PROG}.c ${OPTION1}.c -o ${PROG} ${CFLAGSANDLIBS}
 
 clean:
-	rm ${PROG}
+	rm ${PROG}
+	

NUB Admission Costing Calculator/database/D_sql.c

@@ -0,0 +1,219 @@
+#include "sqlite3.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+// Prints data  
+int callback(void *NotUsed, int argc, char **argv, char **ColName)
+{
+    for (int i = 0; i < argc; i++)
+    {
+        printf("%s = %s\n", ColName[i], argv[i] ? argv[i] : "NULL");
+    }
+    return 0;
+}
+
+// Insert function to enter new data in database through the arguments
+int insert_data(sqlite3 *db, char *department, double credit_fee, double semester_fee, double other_fees, double admission_fee, int total_credit, int total_credit_below, int duration, int semester, int semester_below)
+{
+    char *err_msg = NULL;
+    char sql[512];
+
+    sprintf(sql, "INSERT INTO D_CostingChart(Department, CreditFee, SemesterFee, OtherFees, AdmissionFee, TotalCredit, TotalCreditBelow, Duration, Semester, SemesterBelow) VALUES('%s', %.2f, %.2f, %.2f, %.2f, %d, %d, %d, %d, %d);",
+            department, credit_fee, semester_fee, other_fees, admission_fee, total_credit, total_credit_below, duration, semester, semester_below);
+
+    // Execute an sql statement in the database (to be simple here it inserts) 
+    int rc = sqlite3_exec(db, sql, 0, 0, &err_msg);
+
+    if (rc != SQLITE_OK)
+    {
+        fprintf(stderr, "SQL error: %s\n", err_msg);
+        sqlite3_free(err_msg);
+        return 1;
+    }
+
+    return 0;
+}
+
+// Shows the whole table
+int show_table(sqlite3 *db)
+{
+    char *err_msg = NULL;
+    char *sql = "SELECT * FROM D_CostingChart;";
+
+    // Execute an sql statement in the database (to be simple here it prints) 
+    int rc = sqlite3_exec(db, sql, callback, 0, &err_msg);
+
+    if (rc != SQLITE_OK)
+    {
+        fprintf(stderr, "SQL error: %s\n", err_msg);
+        sqlite3_free(err_msg);
+        return 1;
+    }
+
+    return 0;
+}
+
+// Delete function to Delete any data in database through the argument
+int delete_data(sqlite3 *db, char *department)
+{
+    char *err_msg = NULL;
+    char sql[256];
+
+    sprintf(sql, "DELETE FROM D_CostingChart WHERE Department='%s';", department);
+
+    // Execute an sql statement in the database (to be simple here it deletes)
+    int rc = sqlite3_exec(db, sql, 0, 0, &err_msg);
+
+    if (rc != SQLITE_OK)
+    {
+        fprintf(stderr, "SQL error: %s\n", err_msg);
+        sqlite3_free(err_msg);
+        return 1;
+    }
+
+    return 0;
+}
+
+// Update function to modify data in database through the arguments
+int update_data(sqlite3 *db, char *department, double credit_fee, double semester_fee, double other_fees, double admission_fee, int total_credit, int total_credit_below, int duration, int semester, int semester_below)
+{
+    char *err_msg = NULL;
+    char sql[512];
+
+    sprintf(sql, "UPDATE D_CostingChart SET CreditFee=%.2f, SemesterFee=%.2f, OtherFees=%.2f, AdmissionFee=%.2f, TotalCredit=%d, TotalCreditBelow=%d, Duration=%d, Semester=%d, SemesterBelow=%d WHERE Department='%s';",
+            credit_fee, semester_fee, other_fees, admission_fee, total_credit, total_credit_below, duration, semester, semester_below, department);
+
+    // Execute an sql statement in the database (to be simple here it updates) 
+    int rc = sqlite3_exec(db, sql, 0, 0, &err_msg);
+
+    if (rc != SQLITE_OK)
+    {
+        fprintf(stderr, "SQL error: %s\n", err_msg);
+        sqlite3_free(err_msg);
+        return 1;
+    }
+
+    return 0;
+}
+
+// Total cost calculation function that was initially practiced here before implementing in test.c
+int calculate_total_cost(sqlite3 *db, char *department)
+{
+    char sql[256];
+    sqlite3_stmt *stmt;
+
+    sprintf(sql, "SELECT CreditFee, SemesterFee, OtherFees, AdmissionFee, TotalCredit, TotalCreditBelow, Semester, SemesterBelow FROM D_CostingChart WHERE Department='%s';", department);
+
+    int rc = sqlite3_prepare_v2(db, sql, -1, &stmt, 0);
+
+    if (rc != SQLITE_OK)
+    {
+        fprintf(stderr, "Failed to execute statement: %s\n", sqlite3_errmsg(db));
+        return 1;
+    }
+
+    if (sqlite3_step(stmt) == SQLITE_ROW)
+    {
+        double credit_fee = sqlite3_column_double(stmt, 0);
+        double semester_fee = sqlite3_column_double(stmt, 1);
+        double other_fees = sqlite3_column_double(stmt, 2);
+        double admission_fee = sqlite3_column_double(stmt, 3);
+        int total_credit = sqlite3_column_int(stmt, 4);
+        int semester = sqlite3_column_int(stmt, 6);
+
+        double total_cost = (credit_fee * total_credit) + (semester_fee * semester) + admission_fee + other_fees;
+        printf("Total cost for %s: %.2f\n", department, total_cost);
+    }
+    else
+    {
+        printf("Department not found.\n");
+    }
+
+    sqlite3_finalize(stmt);
+
+    return 0;
+}
+
+int main(int argc, char **argv)
+{
+    sqlite3 *db;
+    char *err_msg = NULL;
+
+    int rc = sqlite3_open("d_costing_chart.db", &db);
+
+    if (rc != SQLITE_OK)
+    {
+        fprintf(stderr, "Cannot open database: %s\n", sqlite3_errmsg(db));
+        sqlite3_close(db);
+
+        return 1;
+    }
+
+    char *sql = "CREATE TABLE IF NOT EXISTS D_CostingChart(Department TEXT PRIMARY KEY, CreditFee REAL, SemesterFee REAL, OtherFees REAL, AdmissionFee REAL, TotalCredit INTEGER, TotalCreditBelow INTEGER, Duration INTEGER, Semester INTEGER, SemesterBelow INTEGER);";
+
+    rc = sqlite3_exec(db, sql, 0, 0, &err_msg);
+
+    if (rc != SQLITE_OK)
+    {
+        fprintf(stderr, "SQL error: %s\n", err_msg);
+
+        sqlite3_free(err_msg);
+        sqlite3_close(db);
+
+        return 1;
+    }
+
+    if (argc > 1 && strcmp(argv[1], "-s") == 0)
+    {
+        show_table(db);
+    }
+
+    if (argc > 1 && strcmp(argv[1], "-i") == 0)
+    {
+        if (argc != 12)
+        {
+            printf("Usage: %s -i <department> <credit_fee> <semester_fee> <other_fees> <admission_fee> <total_credit> <total_credit_below> <duration> <semester> <semester_below>\n", argv[0]);
+            return 1;
+        }
+
+        insert_data(db, argv[2], atof(argv[3]), atof(argv[4]), atof(argv[5]), atof(argv[6]), atoi(argv[7]), atoi(argv[8]), atoi(argv[9]), atoi(argv[10]), atoi(argv[11]));
+    }
+
+    if (argc > 1 && strcmp(argv[1], "-d") == 0)
+    {
+        if (argc != 3)
+        {
+            printf("Usage: %s -d <department>\n", argv[0]);
+            return 1;
+        }
+
+        delete_data(db, argv[2]);
+    }
+
+    if (argc > 1 && strcmp(argv[1], "-u") == 0)
+    {
+        if (argc != 12)
+        {
+            printf("Usage: %s -u <department> <credit_fee> <semester_fee> <other_fees> <admission_fee> <total_credit> <total_credit_below> <duration> <semester> <semester_below>\n", argv[0]);
+            return 1;
+        }
+
+        update_data(db, argv[2], atof(argv[3]), atof(argv[4]), atof(argv[5]), atof(argv[6]), atoi(argv[7]), atoi(argv[8]), atoi(argv[9]), atoi(argv[10]), atoi(argv[11]));
+    }
+
+    if (argc > 1 && strcmp(argv[1], "-c") == 0)
+    {
+        if (argc != 3)
+        {
+            printf("Usage: %s -c <department>\n", argv[0]);
+            return 1;
+        }
+
+        calculate_total_cost(db, argv[2]);
+    }
+
+    sqlite3_close(db);
+
+    return 0;
+}

NUB Admission Costing Calculator/database/Makefile

@@ -0,0 +1,25 @@
+# Makefile for compiling SQL programs and cleaning binaries
+
+CC = gcc
+CFLAGS = -Wall
+LIBS = libsqlite3.a
+
+# Targets
+TARGET1 = sql
+TARGET2 = D_sql
+
+# Source files
+SRC1 = sql.c
+SRC2 = D_sql.c
+
+# Compile the first program
+$(TARGET1): $(SRC1)
+	$(CC) $(CFLAGS) -o $(TARGET1) $(SRC1) $(LIBS)
+
+# Compile the second program
+$(TARGET2): $(SRC2)
+	$(CC) $(CFLAGS) -o $(TARGET2) $(SRC2) $(LIBS)
+
+# Clean target to remove binaries
+clean:
+	rm -f $(TARGET1) $(TARGET2)